3-oxime and 3-oxime esters of 19-nortestosterone



United States Patent 3,532,689 3-0XIME AND 3-0XIME ESTERS OF 19-NORTESTOSTERONE Arvin Pranla] Shrolf, Piscataway, N.J., assignor to Ortho Pharmaceutical Corporation, a corporation of New Jersey N0 Drawing. Continuation-impart of applications Ser. No. 502,384, Oct. 22, 1965, and Ser. No. 563,081, July 6, 1966. This application Apr. 20, 1967, Ser. No. 635,308

Int. Cl. C07c 169/08 US. Cl. 260-23955 Claims ABSTRACT OF THE DISCLOSURE 3-oximes and 3-oxime esters of IO-nortestosterones have post-coital activity for the suppression of reproduction.

This is a continuation-in-part of my applications Ser. No. 502,384 filed Oct. 22, 1965, now abandoned, and Ser. No. 563,081 filed July 6, 1966, now US. Pat. No. 3,437,674.

The novel compounds of the present invention are represented by the formula:

RON:

wherein R is hydrogen, an acyl group having from 2 to 8 carbon atoms or a tetrahydropyranyl group, R is hydrogen or an acyl group having from 2 to 10 carbon atoms and R" is methyl or ethyl.

The compounds of the invention possess valuable pharmacologic activity as antilittering agents, and more particularly, as agents for the suppression of reproduction when given post-coitally.

The compounds of the invention are prepared by reacting a compound of the formula:

EXAMPLE I 17a-ethynyl-17/3-acetoxy-19-norandrost-4-en-3-one oxime A solution of 2.0 g. of 17a-ethynyl-17,8-acetoxy-19- 3,532,689 Patented Oct. 6, 1970 norandrost-4-en-3-one, 10 ml. of pyridine and 1.0 g. of hydroxylamine hydrochloride is heated on a steam bath for one-half hour. The mixture is poured into a large amount of ice and water and the solid thus separated is collected by filtration. It is recrystallized from methanolwater to give 1.6 g. (78%) of 17a-ethynyl-17B-acetoxy- 19-norandrost-4-en-3-one oxime, M.P. 229-230". Amax 238 mu.

Calcd. for C H NO (percent): C, 74.33; H, 8.22; N, 3.94. Found (percent): C, 74.39; H, 8.21; N, 4.01.

EXAMPLE II 17u-ethynyl-19-norandrost-4-en-17,8-01-3-one oxime 17a-ethynyl-l9-norandrost-4-en-l7fl-ol-3-one (1.0 g.) is heated with 10 ml. of pyridine and 300 mg. of hydroxylamine hydrochloride on a steam bath for two hours. The solution is poured over a large amount of water and the precipitates thus formed are collected by filtration. recrystallization from methanol gives l7u-ethynyl-19- norandrost-4-en-17/3-ol-3-one oxime, M.P. 112-114".

Calcd. for C H NO H O (percent): C, 72.47; H, 8.82; N, 4.23. Found (percent): C, 72.44; H, 9.12; N, 4.21.

EXAMPLE III 17,8-caproyloxy-l7a-ethynyl-19-norandrost-4-en-3-one oxime ice Following the procedure of Example I, but starting with 17,8-caproyloxy 17a ethynyl-19-norandrost-4-en-3- one, there is obtained 17B-caproy1oxy-17a-ethynyl-l9- norandrost-4-en-3-one oxirne, M.P. -76".

Calcd. for C26H37N03 (percent): C, 75.87; H, 9.06; N, 3.40. Found (percent): C, 75.66; H, 9.21; N, 3.14.

EXAMPLE IV 17fi-propionyloxy-17u-ethynyl-19-norandrost-4-en-3-one oxime Following the procedure of Example I, but starting with 17fi propionyloxy-17ot-ethynyl-l9-norandrost-4-en-3- one there is obtained 17fl-propionyloxy-17a-ethynyl-l9- norandrost-4-en-3-one oxime, M.P. 101.

Calcd. for C H NO (percent): C, 74.76; H, 8.46; N, 3.79. Found (percent): C, 74.78; H, 8.65; N, 3.17.

EXAMPLE V 17B-decanoyloxy-17a-ethynyl-19-norandrost-4-en-3-one oxime Following the procedure of Example I, but starting with decanoyloxy-17a-ethynyl-19-norandrost-4-en-3- one, there is obtained 17fl-decanoyloxy-l7a-ethynyl-19- norandrost-4-en-3-one oxirne, M.P. 128-1295 Calcd. for C H NO (percent): C, 77.04; H, 9.70; N, 3.00. Found (percent): C, 77.12; H, 9.87; N, 3.27.

In like manner there are prepared:

17u-ethynyl-13fi-ethyl-gon-4-en-175-01-3 -one oxime,

17a-ethynyl- 1 7,8-capropyloxyl 3 fl-ethyl-gon-4-en-3-one oxime, and

17a-ethynyl- 17 fl-decanoyloxyl 3 fl-ethylgon-4-en-3-one oxime.

EXAMPLE VI N,l7fl-diacetoxy-17a-ethynyl-19-norandrost-4-en-3-one oxime A solution containing 3.0 g. of 17a-ethynyl-l7fi-acetoxy-19-norandrost-4-en-3-one oxime in 5.0 ml. of pyridine is treated with 9.0 ml. of acetic anhydride and stirred at room temperature for 15 minutes. The mixture is poured into a large amount of ice and water and neutralized with ammonium hydroxide. The solid portion is collected by filtration, dried and recrystallized from hexane to give N,17,8-diacetoxy-l7a-ethynyl-19-norandrost-4- en-3-one oxime, M.P. 142144 C.

R 243 m n.

max.

Calcd. for C H NO (percent): C, 72.51; H, 7.86; N, 3.52. Found (percent): C, 72.54; H, 8.01; N, 3.73.

EXAMPLE VII N-iso-butyryloxy-l7,8-acetoxy-17a-ethynyl-19- norandost-4-en-3-one oxime A 244 Ill 1..

max.

Calcd. for C H NO (percent): C, 73.38; H, 8.29; N, 3.29. Found (percent): C, 73.31; H, 8.31; N, 3.53.

EXAMPLE VIII N-propionyloxy-175-acetoxy-17a-ethynyl-19- norandrost-4-en-3-one oxime Following the procedure of Example VI or VII, but using propionic anhydride as the esterifying agent, N-propionyloxy 176 acetoxy-l7a-ethynyl-19-norandrost-4-en- 3-one oxime is recrystallized from hexane, M.P. 152- 154 C.

Calcd. for C H NO (percent): C, 72.96; H, 8.08; N, 3.40. Found (percent): C, 72.69; H, 8.24; N, 3.49.

EXAMPLE IX N-caproyloxy-l75-acetoxy-l7a-ethynylr19-norandrost-4- en-3-one oxime Following the procedure of Example I or II, but using caproic anhydride as the esterifying agent, N-caproyloxy- 17B-acetoxy-17u-ethynyl 19 norandrost 4 en-3-one oxime is recrystallized from hexane, M.P. 102104.

Calcd. for C H NO (percent): C, 74.14; H, 8.67; N, 3.09. Found (percent): C, 74.03; H, 8.55; N, 3.33.

EXAMPLE X N-acetoxy-17,8-caproyloxy-17a-ethynyl-19-norandrost-4- en-3-one oxime EtOH max.

Following the procedure of Example VI, but starting with Uri-caproyloxy 17a ethynyl 19 norandrost-4- en-3-one oxime, there is obtained N-acetoxy-17fl-caproy1 oxy-17a-ethynyl-19-norandrost-4-en-3-one oxime, M.P. 110112.

Calcd. for C H NO (percent): C,74.14; H, 8.69; N, 3.13. Found (percent): C, 74.10; H, 8.69; N, 3.13.

EXAMPLE XI N-(Ztetrahydropyranyloxy)-176-acetoxy-17a-ethynyl- 19-norandrost-4-en-3-one oxime 4 Calcd. for C27H37NO4 (percent): C, 73.77; H, 8.48; N, 3.19. Found (percent): C, 74.08; H, 8.32; N, 3.45.

EXAMPLE XII DL-13p-ethyl-17a-ethynyl-17,3-acetoxy-gon-4-en-3-one oxime A solution containing 4.5 g. of DL-l3,B-ethyl 17aethynyl-17,8-acetoxy-gon-4-en-3-one in ml. of pyridine and 2.0 g. of hydroxylamine hydrochloride is heated on a steam bath for 45 minutes. It is cooled and poured into a large amount of ice and Water. The solid material thus formed is collected by filtration and air dried. It is recrystallized from methylene chloride-alcohol mixture to give 4.2 g. of DL-l3,8-ethyl-17a-ethynyl-17/3-acetoxy-gon- 4-en-3-one oxime, M.P. 226-228".

Calcd. for C H NO (percent): C, 74.76; H, 8.46; N, 3.79. Found (percent): C, 74.84; H, 8.75; N, 3.90.

In like manner there are prepared:

N,17fi-diacetoxy-17a-ethynyl-13fi-ethyl-gon-4-en-3-one oxime,

N-iso-butyryloxy-17/i-acetoxy-17a-ethynyl- 13 B-ethyl-gon- 4-en-3-one oxime,

N-propionyloxy-l7,9-acetoxy-17a-ethynyl-13p-ethy1-gon- 4-en-3-one oxime,

N-caproyloxy-175-acetoxy-17a-ethynyl-13fi-ethyl-gon-4- en-3-one oxime,

N-acetoxy-17fl-caproyloxy-17a-ethynyl-13B-ethyl-gon-4- en-3-one oxime, and

N-(2'-tetrahydropyranyloxy)-17B-acetoxy-17a-ethynyl- 13 ,B-ethyl-gon-4-en-3-one oxime.

The antilittering effect of a compound is determined by the following procedure:

(1) The compound to be tested is administered in the diet or by gavage for 7 days to both male and female rats, With the sexes segregated.

(2) Treatment is continued for 15 days during which the rats are permitted to cohabit freely.

(3) The sexes are again segregated and are observed for 21 days with no treatment.

A control group is similarly treated except that the compound is not administered.

The females are observed for pregnancies and the size of litters.

The minimum elfective dose (MED) is the amount of the compound in milligrams per kilogram of animal body weight per day (mg./kg./day), which completely suppresses the production of litters.

TABLE I Compound administered: MED, mg./kg./day a ethynyl 17,6 acetoxy 19 norandrost 4-en-3-one oxime 0.25 170a ethynyl 19 norandrost 4 en 17 ol-3-one oxime 0.25 N,17B diacetoxy 17cc ethynyl 19 norandrost-4-en-3-one oxime 0.25 N propionyloxy 17,6 acetoxy Nix-ethynyl- 19-norandrost-4-en-3-one oxime 1.00 N iso'butyryloxy 17B acetoxy 17a-ethynyl- 19-norandrost-4-en-3-one oxime 1.00 N caproyloxy 17B acetoxy 17a ethynyl- 19-n0randrost-4-en-3-one oxime 1.00 N (2 tetrahydropyranyloxy) l7/8-acetoxy- 17a-ethynyl-19-norandrost-4-en-3-one oxime 0.5 17/3 caproyloxy -17a ethynyl 19 norandrost-4-en-3-one oxime 0.25 propionyloxy I701. ethynyl 19 nordrost-4-en-3-one oxime 0.25

17m ethynyl 19 nortestosterone 20.0 170; ethynyl-17fl-acetoxy-19-nortestosterone 5.0

It Will be observed from Table I above that 170:- ethynyl 175 acetoxy 19 norandrost-4-en-3-one oxime eliminates the production of litters in rats at a dose of 0.25 mg. per kilogram of body weight per day, while a daily dosage of 5.0 mg./kilogram of body weight of its precursor 17a-ethynyl-1718-acetoxy-19-nortestosterone is required to accomplish the total suppression of litters. It will also be observed that 0.25 mg. per kilogram of body weight per day of 17a ethynyl 19 norandrost- 4-en-17fi-ol-3-one oxime totally suppresses rat litters while 20.0 mg. per kilogram of body weight per day of its precursor 17a-ethynyl-l9-nortestosterone is required to accomplish total suppression of rat litters.

In order to determine the post-coital eifect of a compound, female rats of the Wistar strain are fed a compound by gavage on specific days of gestation after sperm are observed in the vagina. The rats are sacrificed and the uterii are examined for implantation and resorbtion sites.

In the following table, day is the day of which sperm is observed in vaginal washings and the compond tested was 17ot-ethynyl-17fl-acetoXy 19 norandrost-4-en-3-one OXIHIG.

TABLE II Day of Implantations adminis- Pregnant/ Dose (mg/kg.) tration total Normal Resorbed It will be observed from Table II that in the species treated, the compound was most efficacious at dose levels of mg./kg. and 5 mg./kg. on days 1 and 2 of pregnancy.

It is believed that the compounds of the invention act post-coitally by lysing the zygote and that this action is most efiective from between 36 to 60 hours after fertilization of the ovum.

What is claimed is:

1. A compound of the formula:

RON:

wherein R is selected from the group consisting of acyl of from 2 to 8 carbon atoms, R' is selected from the group consisting of hydrogen and acyl of from 2 to 10 carbon atoms, and R" is selected from the group consisting of methyl and ethyl.

2. A compound of the formula:

wherein R is selected from the group consisting of acyl of from 2 to 8 carbon atoms and R is selected from the group consisting of hydrogen and acyl of from 2 to 10 carbon atoms according to claim 1.

3. N acetoxy -17oc ethynyl 19 norandrost-4-en- 17/3-ol-3-one oxime according to claim 2.

4. N,17B diacetoxy 17a ethynyl-19-norandrost-4- en-3-one oxime according to claim 2.

5. N iso butyryloxy 17a ethynyl-17,8-acetoxy-19- norandrost4-en-3-one oxime according to claim 2.

6. N propionyloxy 17a ethynyl-17/3-acetoXy-19- norandrost-4-en-3-one oxirne according to claim 2.

7. N caproyloxy 17a ethyny1-17/3-acetoxy-l9- norandrost-4-en-3-one oxime according to claim 2.

8. N acetoxy -17oc ethynyl 1713 caproyloxy 19- norandrost-4-en-3-one oxime according to claim 2.

9. N (2' tetrahydropyranyloxy) 17a ethynyl-17,8- acetoxy-l9-norandrost-4-en-3-one oxime.

10. DL 13B ethyl 17oc ethyny1-17B-acetoXy-gon- 4-en-3-one oxime.

RON-

References Cited UNITED STATES PATENTS 3,060,205 10/1962 ISchWenk et a1. 260397.5 3,299,107 1/1967 Mazur 260397.5

OTHER REFERENCES Smith et al.: Journ. Chem. Soc., November, 1964, pp. 4472-4492, 4473-4476 and 4489 pertinent.

ELBERT L. ROBERTS, Primary Examiner E. G. LOVE, Assistant Examiner U.S. Cl. X.R. 

